Office for Nuclear Regulation

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Sizewell B - Radiological Protection inspection

Executive summary

Purpose of Intervention

This report relates to the planned ONR radiological protection (RP) inspection of the 2019 (RO16) statutory outage of the reactor at EdF Energy Nuclear Generation Limited (NGL) Sizewell B site. It included an inspection of the radiological protection arrangements that the licensee had in place for the outage with a main focus on work in reactor containment.  Elements of this inspection were carried out jointly with NGL Radiation Protection staff from NGL corporate centre and NGL’s Internal Nuclear Assurance function.  

The aim of the radiological protection intervention was:

Interventions Carried Out by ONR

The RP inspection was carried out by me, as part of a joint-inspection (as stated above). This inspection sampled the following through discussions, document review and plant visits:

The intervention was performed in line with ONR's guidance requirements (as described in our technical inspection guides) in the areas inspected.

Explanation of Judgement if Safety System Not Judged to be Adequate

Not applicable – no system based inspection was undertaken.

Key Findings, Inspector's Opinions and Reasons for Judgements Made

The RP inspection did not reveal any significant nuclear safety concerns relevant to the Sizewell B (RO16) outage that require action by the Licensee or further follow-up by ONR.

Discussions with the Head of Radiological Protection (HoRP) at the Station gave me suitable assurance that there is effective radiological protection practice in place; a good level of compliance with the requirements of IRR’17 was evident during plant inspections.

An inspection rating of Green was therefore assigned against IRR’17.

Conclusion of Intervention

The RP inspection identified no matters that should prevent ONR granting Consent under licence condition 30 allowing the Licensee to return Sizewell B to power in due course.